Cabling And Network Configuration; Parameter Settings - GE Hydran 201 i Instruction Manual

5.2.4

Cabling and Network Configuration

Several Hydran 201Ci Controllers installed in a station can be linked together using an
RS-485 link to form a local network. A local network of Hydran 201i Systems can include
up to 32 H201Ci Controllers and 128 Hydran 201Ti's. The H201Ci Controllers
(Hydran 201Ci-C's and/or Hydran 201Ci-1's) can all be connected together. The network
configuration is explained in Chapter 9.
Any H201Ci Controller in a local network can be connected to a host computer (running
the General Electric Canada's Hydran Host software) through an RS-232 or USB link to
monitor all the H201Ti's in the network. The host computer and the network can also
communicate through a modem, thus allowing remote monitoring.
To maximize the benefits of a network, simple guidelines should be followed. Use the
following rules to install and implement a network of Hydran 201i Systems.
5.2.4.1

Parameter Settings

1. The parameters of each H201Ti (identification number, power station identification
number, communication speed, alarm set points, operation mode of relays, etc.) must
be selected before field installation.
2. Each H201Ti of a local network must be set to an individual and exclusive identifi-
cation number (parameter H201Ti ID in the Communication submenu) selected
between 1 and 254. The numbers can be assigned sequentially or using any other
method preferred by the user. If two H201Ti's share the same number in a local
network, they are not able to communicate properly with the host computer. It can be
useful to assign numbers that correspond to the identification numbers of the trans-
formers being monitored; for an example, see Table 5-1 on page 5-14.
3. All H201Ti's belonging to a local network must share a common power station
identification number (parameter PowerStat. ID in the Communication submenu).
This number is used when accessing a station remotely, or when analyzing and
displaying historic data in the Hydran Host software.
4. All H201Ti's in a local network must be set to the same data communication speed
(parameter BaudRate in the Communication submenu; 1,200, 2,400, 4,800 or
9,600 bps). The recommended speed is 9,600 bps.
Part 17997 Rev. 6, March 2011
Installation Overview
5-13